669341693 has 2 divisors, whose sum is σ = 669341694. Its totient is φ = 669341692.

The previous prime is 669341683. The next prime is 669341753. The reversal of 669341693 is 396143966.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 618119044 + 51222649 = 24862^2 + 7157^2 .

It is a cyclic number.

It is not a de Polignac number, because 669341693 - 2⁸ = 669341437 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (669341623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 334670846 + 334670847.

It is an arithmetic number, because the mean of its divisors is an integer number (334670847).

Almost surely, 2^669341693 is an apocalyptic number.

It is an amenable number.

669341693 is a deficient number, since it is larger than the sum of its proper divisors (1).

669341693 is an equidigital number, since it uses as much as digits as its factorization.

669341693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 629856, while the sum is 47.

The square root of 669341693 is about 25871.6387768537. The cubic root of 669341693 is about 874.7473308002.

The spelling of 669341693 in words is "six hundred sixty-nine million, three hundred forty-one thousand, six hundred ninety-three".